static int do_lock(void)
{
int pid;
char pidstr[8];
if ((fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0700)) < 0) {
if ((fd = open(file, O_RDWR)) < 0) {
fprintf(stderr, "Can't open %s\n", file);
return 1;
}
}
if (flock(fd, (shared ? LOCK_SH : LOCK_EX)) < 0) {
fprintf(stderr, "Can't lock %s\n", file);
return 1;
}
pid = fork();
if (pid < 0)
return -1;
if (pid == 0) {
signal(SIGKILL, exit_unlock);
signal(SIGTERM, exit_unlock);
signal(SIGINT, exit_unlock);
if (waitonly)
exit_unlock(0);
else
while (1)
sleep(1);
} else {
if (!waitonly) {
lseek(fd, 0, SEEK_SET);
ftruncate(fd, 0);
sprintf(pidstr, "%d\n", pid);
write(fd, pidstr, strlen(pidstr));
close(fd);
}
return 0;
}
return 0;
}
int
main(int argc, char *argv[])
{
int opt;
char *basedir = NULL, *driver_name = NULL;
int server = 0, mod_unloaded = 0;
int modid, found;
char maj_num[MAX_STR_MAJOR + 1];
int err;
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
#define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
#endif
(void) textdomain(TEXT_DOMAIN);
/* must be run by root */
if (getuid() != 0) {
(void) fprintf(stderr, gettext(ERR_NOT_ROOT));
exit(1);
}
while ((opt = getopt(argc, argv, "b:")) != -1) {
switch (opt) {
case 'b' :
server = 1;
basedir = calloc(strlen(optarg) + 1, 1);
if (basedir == NULL) {
(void) fprintf(stderr, gettext(ERR_NO_MEM));
exit(1);
}
(void) strcat(basedir, optarg);
break;
case '?' :
usage();
exit(1);
}
}
if (argv[optind] != NULL) {
driver_name = calloc(strlen(argv[optind]) + 1, 1);
if (driver_name == NULL) {
(void) fprintf(stderr, gettext(ERR_NO_MEM));
exit(1);
}
(void) strcat(driver_name, argv[optind]);
/*
* check for extra args
*/
if ((optind + 1) != argc) {
usage();
exit(1);
}
} else {
usage();
exit(1);
}
/* set up add_drv filenames */
if ((build_filenames(basedir)) == ERROR) {
exit(1);
}
/* must be only running version of add_drv/mod_drv/rem_drv */
enter_lock();
if ((check_perms_aliases(1, 1)) == ERROR)
err_exit();
if ((check_name_to_major(R_OK | W_OK)) == ERROR)
err_exit();
/* look up the major number of the driver being removed. */
if ((found = get_major_no(driver_name, name_to_major)) == ERROR) {
(void) fprintf(stderr, gettext(ERR_MAX_MAJOR), name_to_major);
err_exit();
}
if (found == UNIQUE) {
(void) fprintf(stderr, gettext(ERR_NOT_INSTALLED),
driver_name);
err_exit();
}
if (!server) {
mod_unloaded = 1;
/* get the module id for this driver */
get_modid(driver_name, &modid);
/* module is installed */
if (modid != -1) {
if (modctl(MODUNLOAD, modid) < 0) {
perror(NULL);
(void) fprintf(stderr, gettext(ERR_MODUN),
driver_name);
mod_unloaded = 0;
}
}
/* unload driver.conf file */
if (modctl(MODUNLOADDRVCONF, (major_t)found) < 0) {
perror(NULL);
(void) fprintf(stderr,
gettext("cannot unload %s.conf\n"), driver_name);
}
}
if (mod_unloaded && (modctl(MODREMMAJBIND, (major_t)found) < 0)) {
perror(NULL);
(void) fprintf(stderr, gettext(ERR_MODREMMAJ), found);
}
/*
* add driver to rem_name_to_major; if this fails, don`t
* delete from name_to_major
*/
(void) sprintf(maj_num, "%d", found);
if (append_to_file(driver_name, maj_num,
rem_name_to_major, ' ', " ") == ERROR) {
(void) fprintf(stderr, gettext(ERR_NO_UPDATE),
rem_name_to_major);
err_exit();
}
/*
* If removing the driver from the running system, notify
* kernel dynamically to remove minor perm entries.
*/
if (basedir == NULL || (strcmp(basedir, "/") == 0)) {
err = devfs_rm_minor_perm(driver_name, log_minorperm_error);
if (err != 0) {
(void) fprintf(stderr, gettext(ERR_UPDATE_PERM),
driver_name, err);
}
}
/*
* delete references to driver in add_drv/rem_drv database
*/
remove_entry(CLEAN_ALL, driver_name);
/*
* Clean up any dangling devfs shadow nodes for this
* driver so that, in the event the driver is re-added
* to the system, newly created nodes won't incorrectly
* pick up these stale shadow node permissions.
*/
if (basedir == NULL || (strcmp(basedir, "/") == 0)) {
err = modctl(MODREMDRVCLEANUP, driver_name, 0, NULL);
if (err != 0) {
(void) fprintf(stderr, gettext(ERR_REMDRV_CLEANUP),
driver_name, err);
}
}
exit_unlock();
return (NOERR);
}
